I can't unwear armor

Put the summary of the bug you're having here

*What I expected to happen was...:*When I wear armor and unwear armor. However, I can't unwear armor!
Describe what you thought should happen here : Is it crash? Or not programing?

What actually happened was...:
Describe what happened here

Steps to Reproduce:
Put a step by step guide on how to trigger the bug here
1. ... go to the 'armor'
2. ... wearing the armor and click unwear(how? Same 0.6.1)